IS200VVIBH1CAC - Vibration Monitor Board

SPECIFICATIONS

Part No.: IS200VVIBH1CAC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 33.0 cm high x 17.8 cm wide
Technology: Surface mount
Temperature Operating: -30 to 65 oC
Number of outputs: Generator breaker coil, 5A at 125 V dc
Power supply voltage: Nominal 125 V dc to breaker coil
MPU pulse rate range: 2 Hz to 20 kHz
MPU pulse rate accuracy: 0.05 percent of reading
Product Type: Vibration Monitor Board
Availability: In Stock
Series: Mark VI

Functional Description

IS200VVIBH1CAC is a Vibration Monitor Board developed by GE. It is a part of Mark VI control system. The Mark VI system incorporates Bently Nevada probes for precise shaft vibration monitoring. This process involves the utilization of the Vibration Monitor Board (VVIB), which is responsible for processing the signals received from the vibration probes connected to the TVIB terminal board.

Terminal Board Connectivity

• The terminal board serves as the interface between the vibration probes and the VVIB processor board.
• It accommodates connections from up to 14 Bently Nevada probes, facilitating comprehensive shaft vibration monitoring.

Vibration Signal Processing

• The board is tasked with digitizing the incoming vibration signals from the connected probes. This digitization process ensures accurate representation of the shaft vibration data.

VME Bus Communication

• Once digitized, the vibration signals are transmitted over the VME bus to the Mark VI controller.
• This communication pathway enables seamless integration of the vibration monitoring data into the control system for analysis and decision-making.

Scalability and Redundancy

• The system design allows for flexibility and scalability, as multiple terminal boards can be cabled to a single VVIB processor board. This arrangement enables the monitoring of a larger number of probes for comprehensive shaft vibration analysis.
• Additionally, redundancy is ensured by the ability to connect two terminal boards to the VVIB processor board, providing backup capability in case of failure or maintenance requirements.

Installation

• Power Down the VME Processor Rack: Before beginning the installation process, ensure that the VME processor rack is powered down completely. This precautionary step prevents any potential electrical hazards during the installation procedure.
• Slide in the Board: Carefully slide the board into the designated slot within the VME processor rack. Ensure that the board is aligned correctly with the slot to facilitate smooth insertion.
• Secure Edge Connectors: Once the VVIB board is inserted into the slot, gently push the top and bottom levers inward with your hands. This action helps seat the edge connectors of the board firmly into the corresponding slots within the rack.
• Tighten Captive Screws: After seating the edge connectors, locate the captive screws positioned at the top and bottom of the front panel of the VVIB board. Use appropriate tools to tighten these screws securely, ensuring that the board is firmly fixed in place within the rack.
• Verify Installation: Once the board is securely installed and the captive screws are tightened, visually inspect the board to confirm that it is properly seated and aligned. Additionally, double-check all connections to ensure they are secure and free from any obstructions.
• Power Up the VME Processor Rack: After completing the installation process and verifying the integrity of the connections, proceed to power up the VME processor rack. Monitor the system to ensure that the VVIB board initializes correctly and is ready for operation.

The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200VVIBH1CAC?
It is a Vibration Monitor Board developed by GE under the Mark VI series.

What is the power source for the probes?
The probes are powered by -24 V dc obtained from the -28 V dc bus. Each probe supply is current-limited to ensure proper operation and prevent overload. The load per transducer is limited to 12 mA.

How is the probe signal sampled?
The Vibration Monitor Board (VVIB) utilizes a 16-bit analog-to-digital converter (A/D converter) with 14-bit resolution for precise signal sampling. In fast scan mode (applicable for RPM ranging from 4,000 to 17,500), the sampling rate is 4,600 samples per second. For RPM less than 4,000, the sampling rate is 2,586 samples per second if nine or more probes are used. All inputs are simultaneously sampled within time windows of 160 ms, ensuring accurate data acquisition.

What are the RPM limitations for utilizing vibration channels?
If the rated RPM exceeds 4,000 rpm, up to eight vibration channels can be used, while the remaining channels may be allocated for proximity or position measurements. However, if the rated RPM is less than 4,000, the system supports the use of all 16 vibration channels in addition to other probe functionalities.

How accurate are the buffered outputs?
The buffered outputs maintain a high level of accuracy, with an amplitude accuracy of 0.1 percent when transmitting signals to the Bently Nevada 3500 vibration analysis system. This ensures precise and reliable vibration data for comprehensive system monitoring and analysis.